error: ff00+c-bad.asm(8):
    Base value must be equal to $FF00 for $FF00+C
error: ff00+c-bad.asm(9):
    Expected constant expression: 'xyz' is not constant at assembly time
error: ff00+c-bad.asm(9):
    Base value must be equal to $FF00 for $FF00+C
error: Assembly aborted (3 errors)!